What Affects the Test
Reasons you may not be able to have the test or why the results may
not be helpful include:
- You have poor hearing or eyesight. An
electronic arm- or wrist-cuff model may be a better choice for
you.
- You cannot put the cuff on or twist the dial to inflate the
cuff.
- The cuff is either too large or too small for your
arm.
Blood pressure normally goes up and down from day to day and even
from minute to minute, depending upon how active you are, whether you are
standing up or sitting down, and what medicines you are taking. Other things
that can change blood pressure include being too hot or too cold, whether you
have recently eaten, and whether you are relaxed or feeling stressed.
Home blood pressure monitoring works best when you also record your
daily activities, such as the time you take medicine if you feel upset or
stressed, in a diary. This can help explain changes in your blood pressure
readings and help your doctor adjust your medicines.
Your blood pressure may only be high when you go to your doctor's
office. This is called
white-coat (or office) hypertension and may be caused
by stress about seeing your doctor. When you regularly check your blood
pressure at home, you may find that your blood pressure is lower when you are
not at the doctor's office.